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Vitamin D

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3 papers 0 to 25 followers
Forough Farrokhyar, Rasam Tabasinejad, Dyda Dao, Devin Peterson, Olufemi R Ayeni, Reza Hadioonzadeh, Mohit Bhandari
BACKGROUND: Vitamin D is essential for maintaining optimal bone health. The prevalence of vitamin D inadequacy in athletes is currently unclear. OBJECTIVE: The objective of this study is to determine the prevalence of vitamin D inadequacy in athletes. METHODS: We conducted a systematic review and meta-analysis. Multiple databases were searched and studies assessing serum 25-hydroxyvitamin D [25(OH)D] status in athletes were identified. Serum 25(OH)D is measured to clinically determine vitamin D status...
March 2015: Sports Medicine
Michael F Holick
The epidemic scourge of rickets in the 19th century was caused by vitamin D deficiency due to inadequate sun exposure and resulted in growth retardation, muscle weakness, skeletal deformities, hypocalcemia, tetany, and seizures. The encouragement of sensible sun exposure and the fortification of milk with vitamin D resulted in almost complete eradication of the disease. Vitamin D (where D represents D2 or D3) is biologically inert and metabolized in the liver to 25-hydroxyvitamin D [25(OH)D], the major circulating form of vitamin D that is used to determine vitamin D status...
August 2006: Journal of Clinical Investigation
Yanbin Dong, Inger S Stallmann-Jorgensen, Norman K Pollock, Ryan A Harris, Daniel Keeton, Ying Huang, Ke Li, Reda Bassali, De-huang Guo, Jeffrey Thomas, Gary L Pierce, Jennifer White, Michael F Holick, Haidong Zhu
CONTEXT: Vitamin D insufficiency/deficiency is commonly observed in black youth. OBJECTIVE: The aim was to determine 25-hydroxyvitamin D [25(OH)D] in response to 2000 IU vitamin D supplementation over time; to evaluate the relation between 25(OH)D concentrations and total body fat mass by dual-energy x-ray absorptiometry; and to determine whether vitamin D supplementation improves arterial stiffness measured by pulse wave velocity (PWV). DESIGN: We conducted a randomized, blinded, controlled clinical trial...
October 2010: Journal of Clinical Endocrinology and Metabolism
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